Rainbow Electronics MAX5858 - Manual (Page 11)

MAX5858
Dual, 10-Bit, 300Msps, Current-Output DAC with
4x/2x/1x Interpolation Filters
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Pin Description
Typical Operating Characteristics (continued)
(AV DD = DV DD = CV DD = 3V ±10%, AGND = DGND = CGND = 0, external reference = 1.2V, no interpolation, I FS = 20mA, differential
output, T
A
= +25°C, unless otherwise noted.)
PIN NAME FUNCTION
1 DA9/PD
Channel A Input Data Bit 9 (MSB)/Power-Down Control Bit:
0: Enter DAC standby mode (DACEN = 0) or power up DAC (DACEN = 1).
1: Enter power-down mode.
2 DA8/DACEN
Channel A Input Data Bit 8/DAC Enable Control Bit:
0: Enter DAC standby mode with PD = 0.
1: Power up DAC with PD = 0.
X: Enter power-down mode with PD = 1 (X = don’t care).
3 DA7/F2EN
Channel A Input Data Bit 7/Second Interpolation Filter Enable Bit:
0: Interpolation mode is determined by F1EN.
Enable 4x interpolation mode. (F1EN must equal 1.)
4 DA6/F1EN
Channel A Input Data Bit 6/First Interpolation Filter Enable Bit:
0: Interpolation disable.
1: Enable 2x interpolation.
5 DA5/G3 Channel A Input Data Bit 5/Channel A Gain Adjustment Bit 3
6, 19, 47 DGND Digital Ground
7, 18, 48 DV DD Digital Power Supply. See the Power Supplies, Bypassing, Decoupling, and Layout section.
8 DA4/G2 Channel A Input Data Bit 4/Channel A Gain Adjustment Bit 2
9 DA3/G1 Channel A Input Data Bit 3/Channel A Gain Adjustment Bit 1
-125
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
-25
0 122.88
ACLR WITH UMTS PLOT
(NO INTERPOLATION, f DAC = 122.88MHz,
f DATA = 122.88MHz, f CENTER = 30.72MHz)
MAX5858 toc28
OUTPUT FREQUENCY (MHz)
OUTPUT POWER (dB)
12.288MHz/div
ACLR = 63dB
0 61.44
ACLR WITH UMTS PLOT
(2x INTERPOLATION, f DAC = 245.76MHz,
f DATA = 122.88MHz, f CENTER = 30.72MHz)
MAX5858 toc29
OUTPUT FREQUENCY (MHz)
OUTPUT POWER (dB)
6.14MHz/div
-125
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
-25
ACLR = 63dB
0 122.88
ACLR WITH UMTS PLOT
(2x INTERPOLATION, f DAC = 245.76MHz,
f DATA = 122.88MHz, f CENTER = 30.72MHz)
MAX5858 toc30
OUTPUT FREQUENCY (MHz)
OUTPUT POWER (dB)
12.288MHz/div
-125
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
-25
ACLR = 63dB